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Climate Prediction Center
 

Climate Diagnostics Bulletin
Climate Diagnostics Bulletin - Home Climate Diagnostics Bulletin - Forecast Climate Diagnostics Bulletin - Extratropics

 

  Tropical Highlights

  Table of Atmospheric Indices  (Table 1)

  Table of Oceanic Indices  (Table 2)

  Time Series

  Time-Longitude Sections

  Mean & Anomaly Fields

  Appendix 1: Outside Contributions

Table of Atmospheric Indices

APRIL 2012

  SLP ANOMALIES TAHITI  850-hPa ZONAL WIND INDEX 200-hPa WIND INDEX OLR Index
MONTH   minus 5N-5S 5N-5S 5N-5S 5N-5S 5N-5S
  TAHITI DARWIN DARWIN SOI 135E-180 175W-140W 135W-120W 165W-110W 160E-160W
APR 12 0.4 0.8 -0.3 0.5 0.6 -0.4 0.6 0.1
MAR 12 -0.8 -2.0 0.7 1.2 0.9 -0.1 1.8 0.8
FEB 12 1.2 0.4 0.5 1.7 0.4 -2.9 0.7 1.9
JAN 12 1.4 -0.7 1.1 1.0 0.9 -1.1 2.3 1.8
DEC 11 2.2 -2.4 2.5 2.3 1.3 -0.4 2.4 1.7
NOV 11 1.7 -0.3 1.1 1.1 1.2 0.2 0.4 1.0
OCT 11 0.9 -0.5 0.8 0.9 0.1 -0.8 -0.2 1.1
SEP 11 2.3 0.4 1.0 1.5 1.1 0.4 0.9 0.3
AUG 11 1.0 0.2 0.4 0.8 0.5 -0.4 0.4 0.3
JUL 11 1.6 -0.2 1.0 0.8 0.6 -1.0 1.4 0.2
JUN 11 1.0 0.6 0.2 0.9 0.6 -0.5 1.2 -0.1
MAY 11 1.2 0.5 0.4 0.6 0.6 -1.1 1.7 0.2
APR 11 2.5 -1.0 1.9 1.5 0.7 -0.9 1.9 1.1

TABLE 1.  Atmospheric index values for the most recent 12 months. Indices are standardized by the mean annual standard deviation, except for the Tahiti and Darwin SLP anomalies which are in units of hPa. Positive (negative) values of 200-hPa zonal wind index imply westerly (easterly) anomalies. Positive (negative) values of 850-hPa zonal wind indices imply easterly (westerly) anomalies. Anomalies are departures from the 1981-2010 base period means.


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